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Do not normalize IDs of Shamir's Secret Sharing #155

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Dec 10, 2021
Merged

Do not normalize IDs of Shamir's Secret Sharing #155

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3 changes: 1 addition & 2 deletions crypto/vss/feldman_vss.go
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ var (
// Check share ids of Shamir's Secret Sharing, return error if duplicate or 0 value found
func CheckIndexes(ec elliptic.Curve, indexes []*big.Int) ([]*big.Int, error) {
visited := make(map[string]struct{})
for i, v := range indexes {
for _, v := range indexes {
vMod := new(big.Int).Mod(v, ec.Params().N)
if vMod.Cmp(zero) == 0 {
return nil, errors.New("party index should not be 0")
Expand All @@ -52,7 +52,6 @@ func CheckIndexes(ec elliptic.Curve, indexes []*big.Int) ([]*big.Int, error) {
return nil, fmt.Errorf("duplicate indexes %s", vModStr)
}
visited[vModStr] = struct{}{}
indexes[i] = vMod
}
return indexes, nil
}
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